Amazon.com : GoPro The Frame for HERO4 Black/HERO4 Silver (GoPro Official Mount) : Electronics
Amazon.com : SOONSUN Frame Mount Extension for GoPro Hero 4 3+ 3 with Screen / Battery Extension - Use with LCD BacPac or Battery Extension - Includes Quick Release Buckle and Thumb Screw : Electronics
3D Printed AG GoPro Hero4 Frame by Anthony Kwon | Pinshape